FREE CONVERTER · ON YOUR DEVICE
Convert WebM to MP3
Add your WebM file below and press the button: Cocuyo extracts the sound of it to MP3 right in your browser, for free and with no watermark. You have a WebM recording (a meeting, a class or a screen capture) and only want the audio in a format any device opens.
- Free, no watermark
- Your files never leave your device
- MP3 pre-selected
HOW TO DO IT
Three steps.
Add your WebM file
Drop it on the box or choose it. Up to 10 videos at once, up to 300 MB and 10 minutes each, as MP3 at 128, 192 or 320 kbps.
Adjust the options
Choose the options you need; the output is MP3.
Download the MP3
Press the button and download each file, or all of them in a ZIP when there are several.
FORMATS
WebM vs MP3: what changes
You have a WebM recording (a meeting, a class or a screen capture) and only want the audio in a format any device opens. The WebM’s Opus audio becomes MP3, which opens anywhere. For speech, 128 kbps is enough and smaller.
| Feature | WebM | MP3 |
|---|---|---|
| What it is | Open video container (VP8, VP9 or AV1 with Opus audio). | Compressed audio. |
| Compression | Lossy and efficient. | Lossy: about 1.4 MB per minute at 192 kbps. |
| Transparency, animation or sound | Video and sound. | Sound only. |
| Compatibility | Browsers; many networks, older phones and editors do not accept it. | Universal: phones, cars, speakers and websites. |
| Best for | Video on websites and recordings made in the browser. | Music, podcasts and audio to share. |
WebM to MP3: common questions
Does converting WebM to MP3 lose quality?
The WebM’s Opus audio becomes MP3, which opens anywhere. For speech, 128 kbps is enough and smaller.
How many files can I convert at once?
Up to 10 videos at once, up to 300 MB and 10 minutes each, as MP3 at 128, 192 or 320 kbps.
Does it work on a phone?
Yes, in current mobile browsers (Chrome, Safari, Edge, Firefox). Large files take a little longer on a phone, and the tab should stay open until the download is ready.
Are my files uploaded to a server?
No. The conversion happens inside your browser: the file is read and processed on your device and is not sent to Cocuyo or to any third party. You can check it in your browser’s network tools: your file is not sent.
Is it really free?
Yes. You can try it before signing up; to download the result we ask for a free account, with no subscription. Your free account comes with 30 welcome uses; after that, each use costs 1 credit (top-ups from US$1), and they are unlimited with Basic or Pro. It never adds a watermark.
Learn how to…
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